由vWF基因的合成与表达缺陷而导致的疾病是
A．血友病
B．血管性血友病
C．遗传性Ⅻ因子缺乏症
D．DIC
E．依K因子缺乏症
参考答案：B
计算机、电视机内都装有小风扇，它工作时把热空气驱走，这是为了避免电流的______效应带来的危害．
It was lucky for him to be admitted _____ the dream university he had longed for. [ ]
A. as
B. to
C. with
D. for
